Roll grinding or similar machine



Dec; 5, 1933. .c. F. SCHNUCK 1,937,985

ROLL GRINDING OR SIMILAR MACHINE Filed Jan. 8, 1930 s She ets-Sfheet 1 3 Sheets-Sheet 3 Dec. 5, 1933. c. F. SCHNUCK ROLL GRINDING OR SIMILAR MACHINE Filed Jan. 8. 1930 Patented Dec. 5, 1933 ROLL GRINDING OR SIMILAR MACHINE Carl F. Schnuck; New Haven, Comic,

Birmingham Company,

Farrel- Ansonia, Conn.

assignor to Incorporated,

Application January 8, 1930. Serial No. 419,319 6 claims. (01. 51-49) This invention relates to that general class of machines such as machine tools, wherein a part of the machine is adapted to be reciprocated relatively to another part upon ways, and more especially to a grinding machine wherein either the grinding wheel or the work is mounted upon a reciprocating carriage or slide.

More particularly, this invention relates to an improvement in coverings or guards for the ways and in the disposition of the ways upon the base of the machine. This invention contemplates an improvement in a machine of this type by the provision of substantially enclosed ways and especially the part thereof that is exposed during .the reciprocating of the carriage thereon, in order to reduce the possibility of chips, emery, or other foreign material, falling upon the ways or mixing with the lubricant applied thereto, which would cause wear and mutilation of the way or other hearings in the machine and result in inaccuracy of the machine operations.

It has been diflicult in the past to properly .cover the ways of such a machine due to the necessity of providing a cover that would permit the free passage of the reciprocating part upon the ways and at the same time dispose the cover closely adjacent the upper surface of the ways. It is particularly important in grinding machines that such a covering be disposed closely adjacent the upper surface of the ways, due to the fact that or the like are thrown off at particles of emery from the grinding wheel and considerable force directed by the air disturbing action of the rapid-.

ly rotating parts of the machine upon the ways or into the lubricant, generally used to flush the ways, in order to properly protect them against such particles that might lodge thereon and be ground into the surface thereof when the reciprocating part passes thereover.

This invention proposes the use of a flexible belt-like guard for the ways and the provision of a novel arrangement for the machine parts and other features whereby this belt may be maintained taut, the guard being disposed closely adjacent the upper surface of the ways and being adapted to permit the free passage of the recip rocating machine part over the ways as well as to form a readily removable cover for an enclosure for the ways.

One of the objects of this invention is to provide an improved machine tool or grinding machine, wherein a part reciprocates relatively to another part, with means to cover the lubricant wells during such reciprocation.

Another object is to provide an improved covering for the ways of a machine of the above type:

Another object 'is to provide an enclosure for the ways upon which a reciprocating machine part is slidably mounted whereby the ways will be more effectively protected from foreign material.

A further object is to provide an improved machine way guard that will more efficiently cover the ways and shield themfrom particles of foreign material that might lodge thereon.

A still further object is to provide a machine with ways which are enclosed and protected in a novel manner, so that the covering for the ways, due to its structureand arrangement upon the machine, will not interfere with the reciprocating action of the machine part that is slidably mounted upon the ways, nor expose the ways during such movement of said reciprocating part.

. To these and other ends, the invention consists in the novel features and combinations of parts to be hereinafter described and claimed.

In the accompanying drawings:

Fig. 1 is a top plan view of a machine embodying the features of this invention;

Fig. 2 is an end view of a part of this machine;

Fig. 3 is a view of the other end of the same part of the machine;

Fig. 4 is a section on line 4-4 of Fig. 2;

Fig. 5 is a section on line 5-5 of Fig. 4;

Fig. 6 is a section on line 6-6 of Fig. 4.

Fig. '7 is a longitudinal sectional view through the base on line '7'7 of Fig. 3;

Fig. 8 is a sectional view on line 8-8 of Fig. '7, and

Fig. 9 is a sectional view on line 9-9 of Fig. '7.

The machine selected to illustrate the features of this invention is a roll grinding machine generally comprising a base 10, work supporting head and tail stocks 11 and 12 respectively, a grinding wheel carriage 13, that is reciprocably mounted upon the base 10 and upon which is mounted a grinding wheel 14, with its driving mechanism 15, and carriage reciprocating and control mechanism 16.

The carriage 13 is mounted upon ways 1'7 and 18 that are disposed in channels 19 and 20, respectively, forming lubricant reservoirs or wells in the base 10. The Ways are of the inverted V-shaped type, the apex 21 thereof being disposed below the upper surface of the base 10.

Upwardly facing shoulders 22 and 23 may be formed along the sides of each of the channels 19 and 20, the surface of which is disposed slightly above the apex 21 of the ways or the ways may be disposed with their apices slightly below the surface of the base and the shoulders 22 and 23 omitted.

The shoulders 22 and 23, when provided, ex

tend outwardly beyond the sides of the channels 19 and and are adapted to support a beltlike cover or guard 24 that is preferably made of substantially flexible material, such as-thin sheet metal or the like.

The way cover or guard 24 extends from one end of the base 10 to the other, being secured thereto at one end by means of bolts or rivets 25 and at the other endby being detachably secured to a bracket 26 by bolts 2'7, the bracket 26 being threadedly engaged by a screw 28 that is journaled in a supporting bracket 29 secured to the base 10. Rotation of the screw 28 will move the bracket 26 lengthwise with respect to the base 15 and guard 24 and loosen or tighten the guard 24 as desired.

The portion of the guard 24 intermediate its ends is threaded through an opening 30 provided in the reciprocable part or carriage 13 and which extends lengthwise, with respect to the base 10, through portions 31 of the part or carriage 13 that are adapted to slide upon the ways 17 and 18.

The portions 31 extend downwardly below the undersurface of the carriage 13 into the channels 19 and 20 and engage the respective ways thereon. The upper surface 33 of each of the portions 31 is formed to gradually raise the guard 24 away from the ways as the carriage 13 reciprocates so as to prevent interference between these parts.

Rollers 34 and 35, journaled respectively at each end of carriage 13 and spaced inwardly therefrom, are disposed with the lowermost point of their peripheries in engagement with the belt or guard 24 to insure that the guard will be directed downwardly and seated upon the upper surface of the base 10, upon the shoulders 22 and 23 and to cover the ways before the respective end of the carriage passes thereover and before the guards are raised by the upper surfaces 33 of the portions 31.

By the provision of the above described 'struc-- ture in a machine of the type under consideration, the ways of the machine will be more effectively protected against the action of foreign material, such as emery and the like, by being substantially enclosed at all times during the operation of the machine.

The novel manner of disposing the ways in channels and below the upper surface. of the base whereby a substantially tight covering for this channel may be provided and in readily permitting the raising of the guard or way covering to eliminate the possibility of interference with the reciprocable carriage, insures that at all times the wayswill be substantially enclosed.

The channels are also useful as oil or other way lubricant receiving means, and as such permit efiicient flushing of the ways with such lubri cant without overflowing. By covering this channel its entire length the lubricant is maintained in a clean condition, no foreign material being permitted to fall therein and thereby carried by it to the bearings or other parts of the machine as well as to the ways.

In Figs. 7, 8 and 9 of the drawings I have illustrated a novel form of guard for the lubricant well which supplies the lubricant for the driving mechanism. Suitably mounted in the carriage 13 is a worm shaft provided with a worm 40, I0-

tatably driven from a suitable source of power, (not shown). The worm 40 meshes with the teeth of a rack 41, secured at one side of the lubricant well or channel 42, provided in the bed 10, as shown more especially in Fig. 9. The rack 41 is stationary and the rotation of the worm in opposite directions causes the carriage 13 to reciprocate over the bed 10. A flexible cover or guard 43 is secured at its ends to the carriage and designed to be reciprocated with the carriage so as to cover the well 42, as the carriage moves. One end of this guard is secured to a bracket 44, which is bolted at 45 to a part of the carriage, while the other end is secured to a bracket 46 a'djustably secured to the carriage by means of a pair of guide pins 47, which pass through openings in the bracket 46, and a bolt 48 designed to pass through a third opening in the bracket and to threadedly receive a nut so, by means of which the bracket may be adjusted with relation to the carriage. In this way, the flexible guard 43 may be kept at the proper ten sion and adjusted to compensate for any changes that may occur during the use of the machine.

As shown in Fig. 9 the upper runs of the guard are designed to rest upon shoulders 50 and 51, at each side of the lubricant well 42, and pass over the end ,walls 52 and 53 of the lubricant well. Mounted in the base 10 at each end of the lubricant well are pulleys 54 and 55. These pulleys are rotatably mounted upon pins 56 and 5'7, suitably fixed in the bed. The flexible guard 43 is trained about these pulleys and the lower run thereof passes through openings 58 and 59 in the webs 60 and 61 of the bed.

It will be obvious, therefore, that the belt guard 43 secured as it is at each end to the carriage, will act similarly to an endless belt and will effectually keep the lubricant channel or well covered at every point not covered by the carriage itself, and that this guard trained about the pulleys 54 and 55 may reciprocate freely with the carriage during the movement of the latter. Moreover, the guard will not interfere in any way with the driving worm 40 and rack 41, through which the carriage is given its reciprocating movement.

While I have shown and described a preferred embodiment of my invention, it is understood that it is not to be limited to all of the details shown but is capable of modification and variation which will lie within the spirit of the invention and the scope of the appended claims.

What I claim is:

having an elongated opening therein, a reciprocable machine part slidably mounted on the base and havingaa part extending into said opening, said opening being provided with laterally extending shoulders upon the sides of the opening, there being upwardly directed faces upon said shoulders and a flexible cover for the opening adapted to lie upon said shoulders below the surface of the base, said reciprocable machine part during its reciprocating movement, moving said covering means out of interfering position with respect to said part, one end of said covering means being secured to the base, and the other end being secured to a bracket, and a screw mounted in the base and threadedly engaging said bracket to adjust the tension on said covering means.

2. In a machine of the character described, a base having an elongated lubricant channel therein, a way in said channel, a slidable ma 1,es7,ass

.chine part movably mounted on said base and having a portion riding on said way, the side walls of said channel being provided with upwardly facing shoulders below the upper surface of the base and a flexible belt-like member having its ends secured to the base and adapted to be supported on said shoulders, said belt-like member having a width substantially equal to the distance between the walls of said channel to cover the same, one end of said belt-like member being secured to the base, and the other end thereof being secured to a bracket, and a screw threadedly engaging said bracket to keep said belt-like member taut.

3. In a machine of the character described, a base having an elongated opening therein, a carriage slidably mounted on the base and having a part extending into said opening, a flexible member adapted to cover said opening, said member having its ends connected to said carriage, pulleys mounted at opposite ends of the base, and the intermediate portion of said member being trained about said pulleys and extending through the base below the carriage.

4. In a machine of the character described, a base having an elongated opening therein, a carriage slidably mounted on the base and having a part extending into said opening, a flexible member adapted to cover said opening, said member having its ends connected to said carriage, pulleys mounted at opposite ends of the base, and the intermediate portion of said member being trained about said pulleys and extending through the base below the carriage. and one of the ends of said members being adjustably connected to the carriage to adjust the tension of said member.

5. A machine of the character described comprising a base having an elongated lubricant channel therein, a carriage slidable on said base and having a part extending into said channel, inwardly extending shoulders formed on the walls of said channel, pulleys carried by the base adjacent the opposite ends oi! the channel, and means to cover said channel comprising a flexible band having its ends connected to the carriage and its intermediate portion trained over the pulleys and extending below the carriage, and

said band being adapted to rest upon said shoulders to effectively close the channel.

6. In a machine of the character described, a base, a reciprocable machine part slidably mounted on said base, said base having an elongated opening therein to receive a portion of said part, and a flexible band to cover said opening extending lengthwise thereover, said flexible band having one end connected to one side of said machine part and the other end connected 1 to the other side of said machine part whereby it is adapted to be moved in both directions by said machine part during its reciprocating movement, and the inner side of said band being maintained at all times in a position to face said opening.

CARL I". BCHNUOK. 

